Abstract: E-learning system utilizing learners’ characteristics which is recognized through learning processes with Open Simulator for overcoming week points is proposed. Through dialogs with avatars in the Open Simulator, it is possible to understand learners’ week points. Using learners’ characteristics, most appropriate subjects and achievement tests are provided by the proposed e-learning system. Experimental results show that the proposed e-learning system is much effective than the conventional e-learning system without utilizing learners’ characteristics.